Create entries for other figures on _PlotIndex.html even if otherfigure.makefig is None, for adding plots created separately
make otherfigure_dict an OrderedDict (if Python version >= 2.7) so that other figures appear in order specified rather than random order.
Merge pull request #112 from rjleveque/otherfigure_fixes

Otherfigure fixes
don't require exact agreement of times when making plots comparing two sets of results
Merge pull request #113 from rjleveque/time-check

Time checking
added JSAnimation_frametools.py utility to make animations in notebook or html file.  Can probably be improved.
Merge pull request #114 from rjleveque/JSAnimation_frametools

added JSAnimation_frametools.py
refer to plotdir rather than assuming _plots
Merge pull request #117 from rjleveque/JSanimation_plotdir

refer to plotdir rather than assuming _plots